The answer is C. In order to carefully control conditions and confirm or disconfirm a hypothesis about the causes of behavior, one must perform an experiment.
Explanation:
Experimental research allows the researcher to control all the variables in order to create the conditions that can confirm or disconfirm a hypothesis. This method aimes to establish a relation of causality between two variables, which means that one variable is generated and determined by the other; this is posible because all of the other variables that can influence it have been controlled.
When a researcher conducts a survey or engages in naturalistic observation, he can't control the variables, therefore, he can only establish a correlation between two variables, but not of causality.
John the Baptist and Jesus of Nazareth were relatives. To the public, John would very well appear superior, as he's been holding his mission out before Jesus, but he recognizes that he is nothing greater than human.
